Document illuminator
US7746520B2 · kind B2 · utility
1Cited by
22References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 23, 2004 |
| Grant date | Jun 29, 2010 |
| Priority date | — |
| Expiry date | Jul 23, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/02895
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A document illuminator comprising a light-transmissive element having an embedded side emitting LED fitted in a cavity formed therein. The light-transmissive element is formed with one or more optical notches and is totally encased in a white surround to yield total internal reflection of the light rays emanating from the LED. The reflected light rays are collected at an aperture which in turn transmits high power and highly uniform illumination profile to illuminate a document.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.